foot

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The lower extremity of the vertebrate leg that is in direct contact with the ground in standing or walking.
• noun A structure used for locomotion or attachment in an invertebrate animal, such as the muscular organ extending from the ventral side of a mollusk.
• noun Something suggestive of a foot in position or function, especially.
• noun The lowest part; the bottom.
• noun The end opposite the head, top, or front.
• noun The termination of the leg of a piece of furniture, especially when shaped or modeled.
• noun The part of a sewing machine that holds down and guides the cloth.
• noun Nautical The lower edge of a sail.
• noun Printing The part of a type body that forms the sides of the groove at the base.
• noun Botany The base of the sporophyte in mosses and liverworts.
• noun The inferior part or rank.
• noun The part of a stocking or high-topped boot that encloses the foot.
• noun A manner of moving; a step.
• noun Speed or momentum, as in a race.
• noun Foot soldiers; infantry.
• noun A unit of poetic meter consisting of stressed and unstressed syllables in any of various set combinations. For example, an iambic foot has an unstressed followed by a stressed syllable.
• noun In classical quantitative verse, a unit of meter consisting of long and short syllables in any of various set combinations.
• noun A unit of length in the US Customary and British Imperial systems equal to 12 inches (0.3048 meter).
• noun Sediment that forms during the refining of oil and other liquids; dregs.
• intransitive verb To go on foot; walk. Often used with it:
• intransitive verb To dance. Often used with it:
• intransitive verb Nautical To make headway; sail.
• intransitive verb To go by foot over, on, or through; tread.
• intransitive verb To execute the steps of (a dance).
• intransitive verb To add up (a column of numbers) and write the sum at the bottom; total.
• intransitive verb To pay; defray.
• intransitive verb To provide (a stocking, for example) with a foot.
• idiom (at (someone's) feet) Enchanted or fascinated by another.
• idiom (best foot forward) A favorable initial impression.
• idiom (feet of clay) An underlying weakness or fault.
• idiom (foot in the door) An initial point of or opportunity for entry.
• idiom (foot in the door) A first step in working toward a goal.
• idiom (get (one's) feet wet) To start a new activity or job.
• idiom (have one foot in the grave) To be on the verge of death, as from illness or severe trauma.
• idiom (have (one's) feet on the ground) To be sensible and practical about one's situation.
• idiom (on (one's) feet) Standing up.
• idiom (on (one's) feet) Fully recovered, as after an illness or convalescence.
• idiom (on (one's) feet) In a sound or stable operating condition.
• idiom (on (one's) feet) In an impromptu situation; extemporaneously.
• idiom (on the right foot) In an auspicious manner.
• idiom (on the wrong foot) In an inauspicious manner.

from The Century Dictionary.

• noun Nautical: The lower edge of a sail.
• noun The part of a mast near the deck.
• noun In botany, one of various organs of attachment.
• To go on foot; walk.
• To tread to measure or music; dance; skip.
• In falconry, to seize the game with the talons and kill it.
• To amount to; sum up: as, their purchases footed up pretty high.